Working principle: according to the theory of plane sound vibration synchronization, when two motors with the same viewpoint as anti tendency to self work synchronously, the inertial force of attachment tendency in the center of rotation of the motor component, equal in size, in the opposite direction of the, offset each other, and with the center connection inclination with respect to the vertical force component tend to the same, each other superposition, the feeder under the effect of the inertia force, feeding trough along the together tendency for simple harmonic vibration, then arrived to transport material is intended.